package com.gcc.web;

import com.gcc.pojo.Book;
import com.gcc.pojo.Page;
import com.gcc.service.BookService;
import com.gcc.service.impl.BookServiceImpl;
import com.gcc.utils.WebUtils;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class ClientBookServlet extends BaseServlet {
    private BookService bookService=new BookServiceImpl();
    protected void page(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("经过了前台的ClientBookServlet程序");
        //1.获取请求的参数 pageNo 和PageSize
        int pageNo= WebUtils.parseInt(req.getParameter("pageNo"),1);
        int pageSize=WebUtils.parseInt(req.getParameter("pageSize"), Page.PAGE_SIZE);
        //2.调用BookService.page(pageNo,pagesize)
        Page<Book> page=bookService.page(pageNo,pageSize);

        page.setUrl("client/bookServlet?action=page");
        //3.保存page对象到request域中
        req.setAttribute("page",page);
        //4.请求转发到pages/manager/book_manager.jsp页面
        req.getRequestDispatcher("/pages/client/index.jsp").forward(req,resp);
    }

    protected void pageByPrice(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //System.out.println("经过了前台的ClientBookServlet程序");
        //1.获取请求的参数 pageNo 和PageSize
        int pageNo= WebUtils.parseInt(req.getParameter("pageNo"),1);
        int pageSize=WebUtils.parseInt(req.getParameter("pageSize"), Page.PAGE_SIZE);
        int min=WebUtils.parseInt(req.getParameter("min"),0);
        int max=WebUtils.parseInt(req.getParameter("max"),Integer.MAX_VALUE);
        //2.调用BookService.page(pageNo,pagesize)
        Page<Book> page=bookService.pageByPrice(pageNo,pageSize,min,max);
        StringBuilder sb=new StringBuilder("client/bookServlet?action=pageByPrice");
        //如果有最大价格的参数，追加到分页的地址参数中
        if(req.getParameter("max")!=null)
        {
            sb.append("&max=").append(req.getParameter("max"));
        }
        //如果有最小价格的参数，追加到分页的地址参数中
        if(req.getParameter("min")!=null)
        {
            sb.append("&min=").append(req.getParameter("min"));
        }

        page.setUrl(sb.toString());
        //3.保存page对象到request域中
        req.setAttribute("page",page);
        //4.请求转发到pages/manager/book_manager.jsp页面
        req.getRequestDispatcher("/pages/client/index.jsp").forward(req,resp);
    }
}

